The motor transmits power through belt&comma; drives the moving jaw do periodic motion to the fixed jaw surround the eccentric shaft&period; The angle between toggle plate and moving jaw increases when moving jaw moves up&period; So the moving jaw closes to the fixed jaw&period; The stuff will be crushed in this process&period; The angle between toggle plate and moving jaw decreases when moving jaw moves down&comma; the moving jaw moves away from fixed jaw by the pulling of rod and spring&comma; the products such as stone after crushing will be discharged from the outlet&period;